Alternate Fuel Patents (Class 110/262)
  • Patent number: 10571120
    Abstract: In a combustion apparatus provided with: a combustion box having a connection flange part for connecting a heat exchanger to an upper end of the combustion box; a partition plate disposed inside the combustion box for partitioning space inside the combustion box into a combustion chamber and an air supply chamber which lies under the combustion chamber; and a plurality of laterally arrayed burners which are elongated longitudinally, the internal volume of the combustion box is increased without increasing a height dimension or without enlarging the connection flange part, thereby restraining the occurrence of resonance sounds. A drawn part projecting laterally outward of the combustion box is provided in such a portion of each side-plate part as is above the partition plate, over a predetermined range in the vertical and longitudinal directions. An upper side of the drawn part is preferably positioned below the upper end of the burners, and is preferably parallel with the upper end of the burners.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: February 25, 2020
    Assignee: RINNAI CORPORATION
    Inventor: Yusuke Asai
  • Patent number: 10502453
    Abstract: The burner case has a first member having a caulking portion and a second member having a facing portion facing the caulking portion and an extending portion for caulking, the extending portion extending from the facing portion, the caulking portion being held between the facing portion and the extending portion by bending the extending portion. A part of the extending portion in longitudinal direction constitutes a claw portion. Thus, the first member and the second member are not required to be screwed or the number of screws is reduced, thereby improving productivity of the burner case and reducing the production cost of the burner case.
    Type: Grant
    Filed: August 22, 2017
    Date of Patent: December 10, 2019
    Assignee: NORITZ CORPORATION
    Inventors: Naoki Se, Michihisa Nakahara, Hideyuki Fujisawa, Kenichi Sakurai, Taihei Terasawa
  • Patent number: 10480791
    Abstract: A fuel injector to reduce NOx emissions in a combustor system. The fuel injector including a housing, at least one oxidizer flow path, extending axially through the fuel injector housing and defining therein one or more oxidizer flow paths for an oxidizer stream and a fuel manifold, extending axially through the fuel injector housing and defining therein one or more fuel flow path. The fuel manifold includes a forward portion and an aft portion including an aft face. A plurality of fuel injector outlets are defined in the aft portion, wherein the plurality of fuel injector outlets are configured to inject a fuel flow along a mid-plane of the fuel injector and away from a downstream wall. The fuel flow exiting the fuel manifold undergoes circumferential and radial mixing upon interaction with the oxidizer stream. Additionally disclosed is a combustor system including the fuel injector.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: November 19, 2019
    Assignee: General Electric Company
    Inventors: Krishna Kumar Venkatesan, Joel Meier Haynes, Narendra Digamber Joshi, David James Walker, Junwoo Lim, Sarah Marie Monahan
  • Patent number: 9328301
    Abstract: An injector for co-feeding liquid and solid fuels into a gasifier is provided. The injector includes a body, a first member, and a second member. The body comprises a first channel for conveying a liquid fuel. The first member surrounds the body to define a second channel for pneumatically conveying a solid fuel. The second member surrounds the first member to define a third channel for conveying a fluid stream for dispersing the solid fuel. The liquid fuel is atomized before being mixed with the solid fuel. A method for co-feeding liquid and solid fuels is also presented.
    Type: Grant
    Filed: November 9, 2010
    Date of Patent: May 3, 2016
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Xiangqi Wang, Wei Chen, Ke Liu, Lishun Hu, Zhe Cui, Xianglong Zhao
  • Patent number: 9033698
    Abstract: A system and techniques for waste oil combustion are provided. The techniques include straining waste oil, separating contaminants from the strained waste oil to produce segregated layers of waste oil, selectively drawing a segregated layer of the waste oil, entraining the drawn waste oil to a burner for combustion, and regulating flow rate to produce a controllable amount of heat output. The system includes a container for straining waste oil, a storage drum for separating contaminants from the strained waste oil via gravity separation to produce segregated waste oil, an oil uptake channel for entraining the waste oil from the storage drum, a fuel regulator for controlling rate of flow of the waste oil from the storage drum to a burner head via the oil uptake channel, and a burner head control for repositioning a burner head under the input stream to produce a controllable amount of heat output.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: May 19, 2015
    Inventor: Thomas S. Leue
  • Publication number: 20150090165
    Abstract: This disclosure may relate generally to systems, devices, and methods for a injecting a compound through a sootblower, burner or other utility furnace hardware, such that the compound can be delivered to targeted areas on the inside of a utility furnace. In one embodiment, the compound is a chemical for improving environmental controls. In another embodiment, the compound is a fuel. In that embodiment, compound can facilitate retrofitting a burner to a dual fired utility furnace. In another embodiment, the compound is a chemical for removing slag from the furnace.
    Type: Application
    Filed: December 8, 2014
    Publication date: April 2, 2015
    Inventor: Christopher L. Abeyta
  • Patent number: 8915199
    Abstract: Described is an integrated process of cogasifying an engineered fuel, formulated to be suitable for working under reducing environment, with coal and cofiring another engineered fuel, formulated to be suitable for working under oxidizing environment, with coal to produce electric power.
    Type: Grant
    Filed: April 23, 2012
    Date of Patent: December 23, 2014
    Assignee: Accordant Energy, LLC
    Inventors: James W. Bohlig, Dingrong Bai
  • Publication number: 20140305357
    Abstract: A dual phase fuel feeder is disclosed that can be used to provide both solid fuels and liquid fuels to a boiler, such as a fluidized bed boiler. The fuel feeder includes a sloped chute which defines a solid feedpath. Gas distribution nozzles are located at the base of the fuel feeder, and secondary nozzles are located so as to be able to distribute a liquid or particulate fuel into the solid feedpath. This permits the liquid fuel to contact the solid fuel and be carried into the fluidized bed instead of becoming suspended above the bed.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 16, 2014
    Inventors: James F. DeSELLEM, Karl M. HEIL, Jeremiah J. YODER, Albert D. LaRUE, Mikhail MARYAMCHIK, William R. STIRGWOLT
  • Patent number: 8820249
    Abstract: A burner having a secondary air regulator is provided. The secondary air regulator has an end plate having a bored hole penetrating in an axial direction and for forming a cylindrical space with peripheral surface opened in a space with the furnace core side surface of the wind box, a rotary damper having a bored hole penetrating in an axial direction and being capable to open or close the hole on the end plate by rotating in a peripheral direction, a sliding damper for surrounding the cylindrical space and being slidable in an axial direction, air vanes installed at a predetermined distance along circumference of the cylindrical space and for giving swirling to the secondary air, first driving means for rotating the rotary sliding damper, and second driving means for sliding the sliding damper.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: September 2, 2014
    Assignee: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8794960
    Abstract: A low NOx burner for installation on a furnace wall has an elongated tube connected to a combustion air supply, the furnace side end of which mounts a combustion air spinner that is spaced from the furnace wall. A plurality of air ports extend through the wall into the combustion chamber. Downstream ends of the air ports are spaced from the furnace wall as well as from the spinner, and they are configured to bias the discharged air flow towards the spinner. A plurality of first fuel gas spuds with fuel gas discharge orifices arranged about the spinner and discharges fuel gas into the combustion chamber downstream of the spinner. A second fuel gas spud is disposed in pockets between adjacent pairs of air ports which are closed against the furnace wall so that no combustion air flows through the pockets. The third gas spuds are placed inside the air ports.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: August 5, 2014
    Assignee: John Zink Company, LLC
    Inventors: Vladimir Lifshits, Stephen B. Londerville
  • Patent number: 8726819
    Abstract: A burner is arranged axially of a burner throat on a furnace wall and includes a nozzle body housed in a wind box and with a secondary air adjuster on a leading end of the nozzle body. The adjuster includes an end plate for defining together with a near-furnace side surface of the wind box a cylindrical space opened in an outer circumference thereof, a slide damper axially slidable for surrounding the cylindrical space, air vanes arranged at predetermined intervals and circumferentially of the cylindrical space for swirling a secondary air and drive means and for slide movement of the slide damper.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: May 20, 2014
    Assignee: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8646394
    Abstract: A burner 15 where a secondary air regulator 36 is provided on a forward end of a nozzle main unit 16 to be installed along the central axis of a burner throat 13 being installed on a furnace wall 12 and to be accommodated in a wind box 14, wherein the secondary air regulator has an end plate 37 having a bored hole 38 penetrating in an axial direction and for forming a cylindrical space 48 with peripheral surface opened in a space with the furnace core side surface of the wind box, a rotary damper 42 having a bored hole 45 penetrating in an axial direction and being capable to open or close the hole on the end plate by rotating in a peripheral direction, a sliding damper 52 for surrounding the cylindrical space and being slidable in an axial direction, air vanes 46 and 47 installed at a predetermined distance along circumference of the cylindrical space and for giving swirling to the secondary air 34, first driving means 54, 56 and 44 for rotating the rotary sliding damper, and second driving means 53 and 55 f
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: February 11, 2014
    Assignee: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Patent number: 8561554
    Abstract: To provide a burner structure in which a burner is capable of highly precisely controlling the flow rate of the air for combustion within itself. An air flow passage (11) in a wind box (12) for injecting the air for combustion into a furnace (1) has a bent portion (13) just before joining with the furnace, and one or a plurality of guide vanes (14) are provided in the air flow passage (11) in the bent portion (13), and also in the bent portion (13), a drift control damper (16) is provided for varying the ratio of flow passage resistances of each of the air flow passages (11) divided by the guide vanes (14).
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 22, 2013
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Ryuhei Takashima, Takuichiro Daimaru, Shinya Hamasaki
  • Patent number: 8506287
    Abstract: An apparatus and process is provided for combining fuel and combustion air to produce a mixture. The mixture is burned in a combustion chamber to produce a flame.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: August 13, 2013
    Assignee: Honeywell International Inc.
    Inventors: Douglas M. Perry, Jeffrey T. Rafter
  • Patent number: 8308477
    Abstract: An apparatus and process is provided for combining fuel and combustion air to produce a mixture. The mixture is burned in a combustion chamber to produce a flame.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: November 13, 2012
    Assignee: Honeywell International Inc.
    Inventors: Douglas M. Perry, Jeffrey T. Rafter
  • Patent number: 8177547
    Abstract: The invention relates to a method for starting a burner for combusting synthesis gases, wherein said burner comprises first and second fuel passages, the first fuel passage encompasses the second fuel passage in a substantially concentric manner and the gas transferred to the burner is mixed with combusting air and is combusted. According to said invention, in order to start the burner, the second fuel passage is first loaded with a synthesis gas to a predefined burner power at a first starting phase and the first fuel passage is loaded with the synthesis gas at a second starting phase.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: May 15, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventors: Berthold Köstlin, Frank Hannemann, Andreas Heilos, Gerhard Zimmermann
  • Publication number: 20120073261
    Abstract: A combustor apparatus is provided, comprising a mixing arrangement for mixing a carbonaceous fuel with enriched oxygen and a working fluid to form a fuel mixture. A combustion chamber is at least partially defined by a porous perimetric transpiration member, at least partially surrounded by a pressure containment member. The combustion chamber has longitudinally spaced apart inlet and outlet portions. The fuel mixture is received by the inlet portion for combustion within the combustion chamber at a combustion temperature to form a combustion product. The combustion chamber directs the combustion product longitudinally toward the outlet portion.
    Type: Application
    Filed: August 29, 2011
    Publication date: March 29, 2012
    Inventors: Miles R. Palmer, Rodney John Allam, Glenn William Brown, JR., Jeremy Eron Fetvedt
  • Patent number: 8113824
    Abstract: A large diameter mid-zone air separation cone is provided for decreasing NOx during burner operation by expanding the internal recirculation zone (IRZ) at the burner exit. The mid-zone air separation cone has a short cylindrical leading edge that fits in the outer air zone of a burner. The mid-zone air separation cone splits the outer air zone secondary air flow into two equal or unequal streams depending on the position of the air separation cone with respect to the outer air zone, and deflects a portion of the secondary air flow radially outward. Since the radial position of the air separation cone is farther from the burner centerline, the IRZ size is expanded and NOx emissions are minimized.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: February 14, 2012
    Inventors: Hamid Sarv, Albert D. LaRue, William J. Kahle, Alan N. Sayre, Daniel R. Rowley
  • Patent number: 8015932
    Abstract: A fuel flexible furnace, including a main combustion zone, a reburn zone downstream from the main combustion zone, and a delivery system operably coupled to supplies of biomass and coal and configured to deliver the biomass and the coal as ingredients of first and reburn fuels to the main combustion zone and the reburn zone, with each fuel including flexible quantities of the biomass and/or the coal. The flexible quantities are variable with the furnace in an operating condition.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: September 13, 2011
    Assignee: General Electric Company
    Inventors: Boris Nikolaevich Eiteneer, William Randall Seeker, Roy Payne
  • Publication number: 20110139048
    Abstract: A burner is arranged axially of a burner throat on a furnace wall and includes a nozzle body housed in a wind box and with a secondary air adjuster on a leading end of the nozzle body. The adjuster includes an end plate for defining together with a near-furnace side surface of the wind box a cylindrical space opened in an outer circumference thereof, a slide damper axially slidable for surrounding the cylindrical space, air vanes arranged at predetermined intervals and circumferentially of the cylindrical space for swirling a secondary air and drive means and for slide movement of the slide damper.
    Type: Application
    Filed: March 27, 2009
    Publication date: June 16, 2011
    Applicant: IHI Corporation
    Inventors: Masato Tamura, Shinji Watanabe
  • Publication number: 20110126780
    Abstract: In order to provide a pulverized coal burner for an oxyfuel combustion boiler which attains uniform combustion from a pulverized coal burner and which constrains a temperature rise of an oxygen injection nozzle, burner inner and outer cylinders are arranged to penetrate a wind box 2 and come close to a throat portion 3. A pulverized coal feed passage 9 is provided between the burner inner and outer cylinders 4 and 5. A plurality of oxygen injection means 11 are arranged outwardly of the burner outer cylinder 4 so as to directly feed oxygen ahead of the burner outer cylinder 4.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 2, 2011
    Applicants: IHI CORPORATION, ELECTRIC POWER DEVELOPMENT CO., LTD.
    Inventors: Shuuhei Terushita, Toshihiko Yamada, Shuzo Watanabe, Terutoshi Uchida
  • Patent number: 7914280
    Abstract: A method comprises providing a combustion apparatus having an outer vessel and an inner conduit. The outer vessel has a first wall that defines an internal volume. The inner conduit is at least partially positioned within the internal volume and provides a fluid passageway that is in communication therewith. The method further comprises introducing oxygen into the internal volume in a manner such that the oxygen swirls within the internal volume and around the inner conduit. Furthermore, the method comprises introducing fuel into the internal volume, and combusting the fuel and oxygen at least partially therewithin. The combustion of the fuel and oxygen produces reaction products and the method further comprises discharging at least some of the reaction products from the internal volume via the fluid passageway of the inner conduit.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: March 29, 2011
    Assignee: Innovative Energy, Inc.
    Inventors: Andrew Schlote, Phil Gerard Langhorst
  • Publication number: 20090233250
    Abstract: Disclosed is a furnace adapted for burning solid materials, including biomass fuels. The furnace comprises an igniter having a heating element carried by a ceramic core and disposed within a ceramic cover tube for directing air at fuel disposed within the furnace for the purpose of igniting the fuel. Also disclosed is an igniter having a heating element carried by a ceramic core and disposed within a ceramic cover tube for directing air at fuel disposed within the furnace for the purpose of igniting the fuel.
    Type: Application
    Filed: February 18, 2009
    Publication date: September 17, 2009
    Applicant: Thermetic Products, Inc.
    Inventors: J. Evan Johnson, Scott H. Bents
  • Patent number: 6986311
    Abstract: A burner assembly cofires a primary solid fuel and a secondary solid fuel in a combustion zone of a boiler. The burner assembly includes a fuel injector that mixes the primary solid fuel and the secondary solid fuel prior to injection into the combustion zone of the boiler. The primary solid fuel may be pulverized coal, pulverized petroleum coke, or the like, while the secondary solid fuel may be a biomass fuel or refuse-derived fuel.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: January 17, 2006
    Assignee: Joel Vatsky
    Inventors: Joel Vatsky, Richard E. Conn
  • Patent number: 6973883
    Abstract: The present invention pertains to the use of feedlot biomass as reburn fuel matter to reduce NOx emissions. According to one embodiment of the invention, feedlot biomass is used as the reburn fuel to reduce NOx. The invention also includes burners and boiler in which feedlot biomass serves a reburn fuel.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: December 13, 2005
    Assignee: The Texas A&M University System
    Inventors: Kalyan Annamalai, John M. Sweeten
  • Patent number: 6951454
    Abstract: A dual fuel burner including an elongated supply pipe and a gas injector for a boiler furnace having a plurality of peripheral openings around a center opening. The peripheral openings are pitched radially away from the longitudinal axis of the gas injector and also pitched either clockwise or counter-clockwise, to impart a swirling motion to gaseous fuel exiting the injector through the openings. A first sleeve member is concentrically spaced about the supply pipe and the gas injector to form an inner annular passageway for conveying a mixture of primary air and pulverized coal to the furnace combustion zone. A second sleeve member is concentrically spaced about the first sleeve member to form an outer annular passageway for conveying secondary air to the furnace combustion zone, and a plurality of circumferentially spaced vanes mounted within the outer annular passageway for inducing a swirling motion to the secondary air discharging from the outer annular passageway into the furnace combustion zone.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: October 4, 2005
    Assignee: The Babcock & Wilcox Company
    Inventors: Hamid Sarv, Ronald C. Lenzer
  • Publication number: 20040234912
    Abstract: A gas injector for a furnace or boiler gas-fired burner has a plurality of peripheral openings around a center opening. The peripheral openings are pitched radially away from the longitudinal axis of the gas injector and also pitched either clockwise (CW) or counter-clockwise (CCW), to impart a swirling motion to gaseous fuel exiting the injector through the openings. The gas injector with the radial plus CW or CCW pitched peripheral openings has reduced flame length and lower CO emissions and only slightly elevated levels of NOx emissions relative to a gas injector with only radially pitched openings. The gas injector is useful in furnaces having small enclosures to prevent burner flames from impinging on the opposing walls.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 25, 2004
    Inventors: Hamid Sarv, Ronald C. Lenzer
  • Publication number: 20040139894
    Abstract: A burner assembly cofires a primary solid fuel and a secondary solid fuel in a combustion zone of a boiler. The burner assembly includes a fuel injector that mixes the primary solid fuel and the secondary solid fuel prior to injection into the combustion zone of the boiler. The primary solid fuel may be pulverized coal, pulverized petroleum coke, or the like, while the secondary solid fuel may be a biomass fuel or refuse-derived fuel.
    Type: Application
    Filed: January 22, 2003
    Publication date: July 22, 2004
    Applicant: Joel Vatsky
    Inventors: Joel Vatsky, Richard E. Conn
  • Publication number: 20040112264
    Abstract: A method for treatment of sludge is disclosed, wherein the sludge has a liquid part and metal-containing particles intermixed therein. The particles comprise metal, metal oxide or metal hydroxide and the method comprises the following steps: atomising the sludge; supplying the atomised sludge to a flame of a burner provided in a furnace; bringing the liquid part of the sludge to vaporise by means of the flame while maintaining said flame by means of a separate fuel supply; and bringing at least part of the metal-containing particles to melt by means of the flame. This provides an efficient method for taking care of waste material from plants in the steel or petrochemical industry, for example.
    Type: Application
    Filed: January 26, 2004
    Publication date: June 17, 2004
    Inventors: Joachim Von Scheele, Mats Johansson, Lennart Rangmark
  • Patent number: 6732665
    Abstract: The invention relates to an arrangement for utilizing small-grained oilseeds, preferably rapeseed, without the need for prior processing of the seeds such as expressing the oil, in which a pressure of at least 2 bar is maintained in the combustion space (2) of a combustion chamber (1). In this combustion space, an oil or gas burner (8) is provided, which preheats the combustion space (2) to a temperature of at least c. 1000° C., causing the initial seeds fed into the combustion space (2) through a feed line (3) to ignite, if the required combustion air is supplied at the same time through a combustion air supply line (6). The seeds fed in subsequently through the feed line bum explosively in a chain reaction if the combustion air is supplied in controlled amounts, and if the required pressure is maintained in the combustion space. The resulting flame exits through a flame exit opening (9) and can be used for heating purposes.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: May 11, 2004
    Inventor: Johann Kuebel
  • Publication number: 20040074427
    Abstract: Combustion of hydrocarbon liquids and solids is achieved with less formation of NOx by feeding a small amount of oxygen into the fuel stream.
    Type: Application
    Filed: May 13, 2003
    Publication date: April 22, 2004
    Inventors: Hisashi Kobayashi, Lawrence E. Bool
  • Patent number: 6595769
    Abstract: A combustion burner includes a nozzle body formed in the shape of a pipe having an jet hole and a fuel nozzle installed into the nozzle body including an air jet hole, and having a fuel supply passage supplies fuel from the tip portion of the fuel nozzle. The combustion burner further includes an air supply case which conducts air to the air jet hole. A mixing device is installed into the air supply case so that water and oil including light oil, heavy oil and the like are mixed by a simple mixer while flowing towards the fuel nozzle, and mixed fuel is burned at lower cost without dissociation or the need for expensive equipment.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: July 22, 2003
    Inventor: Masahiro Watanabe
  • Patent number: 6546883
    Abstract: A thermo-oxidizer evaporator is provided with a combustion chamber, burners, and waste water injection system. The waste water injection system is preferably adapted to atomize the waste water stream. The waste water is injected near the flame from the burners so as to evaporate water in the waste water stream and combust contaminants in the waste water stream. The water leaves the combustion chamber as vapor, and contaminants collect at the bottom of the combustion chamber as dry ash. Heat exchange apparatus heats air prior to injection into the combustion chamber. A temperature controller controls fuel and air flow into the combustion chamber. Baffles in the combustion chamber increase the residence time to facilitate the settling of solid constituents from the gas stream leaving the combustion chamber. Methods for treating liquid wastes are also disclosed.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: April 15, 2003
    Assignee: RGF, Inc.
    Inventors: Ronald George Fink, Andrew Charles Hyatt, Walter Bernard Ellis
  • Publication number: 20020152937
    Abstract: Processes and systems are provided that include introducing ammonia liberated from organic waste to a coal burner in a coal burning power plant, preferably for NOx removal at the power plant. The ammonia is preferably either ammonia liberated upon drying a mixture of organic waste and coal combustion by-products or ammonia liberated when organic waste is mixed with coal combustion by-products and one or more alkaline additives. Also provided are processes and systems of fueling a coal burner of a power plant with coal and either a dried mixture of organic waste and coal combustion by-products, or a mixture of organic waste, coal combustion by-products and one or more alkaline additives. The present invention is further directed to mixtures of either organic waste and coal combustion by-products, or mixtures of organic waste, coal combustion by-products and alkaline additives made by the processes of the present invention.
    Type: Application
    Filed: January 3, 2002
    Publication date: October 24, 2002
    Inventors: Terry J. Logan, Ervin L. Faulmann
  • Patent number: 6450108
    Abstract: A system for combusting difficult to combust fluid such as waste fluid wherein fuel and gaseous oxidant combust in a hot combustion gas chamber to form a hot combustion gas mixture which is accelerated to a high speed and at a steady, i.e. non-pulsing, flow is then used to atomize and then combust the fluid.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: September 17, 2002
    Assignee: Praxair Technology, Inc.
    Inventors: Lawrence E. Bool, III, John Erling Anderson, Glenn William Arnold, Christopher Brian Leger
  • Patent number: 6439140
    Abstract: A fuel being primarily a liquid fuel is ejected through a fuel ejection pipe having an annular ejection opening; primary air is ejected through primary air-ejecting openings arranged on outer and inner sides of the fuel ejection opening, to form outer and inner primary air-ejection straight stream openings between which the fuel ejection stream is interposed, and to burn the fuel ejection stream. The fuel-spraying openings are arranged on the same circumference. The outer and inner primary air-ejecting openings, respectively, are each arranged on a respective concentric circumference having a center point identical to the center of the circumference on which the fuel-spraying openings are arranged. When a power fuel is used, optionally a liquid fuel is further ejected and mixed with the primary air stream, and the liquid and power fuels are burnt together.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: August 27, 2002
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Katsuji Mukai, Yoshihiko Sumitani, Toshiyuki Ishinohachi
  • Publication number: 20020068846
    Abstract: A method for making harmless a material to be treated containing a pollutant, including the steps of arranging a pair of ejecting nozzles such that nozzle openings thereof are opposed to each other inside a pressure-proof furnace, thermally treating that material, ejecting the thermally treated material through each of the nozzle openings of the nozzles, respectively, and colliding the material ejected through one of the nozzles with that ejected through the other in a space inside the pressure-proof furnace and between a pair of the nozzle openings such that a portion of the pollutant of the material remaining non-decomposed by the thermal treatment may be decomposed.
    Type: Application
    Filed: April 24, 2001
    Publication date: June 6, 2002
    Applicant: SAN IKU CO., LTD.
    Inventor: Hisao Tsuruta
  • Patent number: 6389998
    Abstract: A fuel selected from powder fuels and liquid fuel is ejected through a fuel ejection pipe having an annular ejection opening; primary air is ejected through primary air-ejecting openings arranged on outer and inner sides of the fuel ejection, to form outer and inner primary air-ejection straight streams between which the fuel ejection stream is interposed, and to burn the fuel ejection stream. When a powder fuel is used, optionally, a liquid fuel is further ejected and mixed with the above-mentioned primary air streams, and the liquid and powder fuels are burnt together.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: May 21, 2002
    Assignee: Sumitomo Osaka Cement Co., Ltd.
    Inventors: Katsuji Mukai, Yoshihiko Sumitani, Toshiyuki Ishinohachi
  • Patent number: 6379146
    Abstract: A flow divider for use in a gas burner assembly supported in an opening in a furnace wall has injected fluid, such as gas and/or air, flowing through an inner burner pipe then outwardly through a plurality of openings for burning along the surface of a wall thus providing a near uniform radiant heat energy to the furnace. The flow divider has a plurality of nested members and a plurality of in-line members to divide the flowing gas and/or air to improve distribution and to promote more uniform mixing of the gas and air.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: April 30, 2002
    Assignee: Zeeco, Inc.
    Inventors: Darton J. Zink, Rex K. Isaacs, John McDonald, Tim Kirk
  • Patent number: 6360677
    Abstract: An injector for a burner is provided in which assemblies for injecting the main and auxiliary fuels and the oxidizer are arranged radially, one around the other, about a longitudinal axis. The injector has a main-fuel outlet, an oxidizer outlet, and an auxiliary-fuel outlet on the respective assemblies. The injector can be used in incinerator applications, such as in methods for producing clinker.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: March 26, 2002
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Dominique Robillard, Thierry Borissoff, Celso Zerbinatti, Dora Sophia Alves, Jacques Dugue
  • Publication number: 20010032572
    Abstract: A fuel selected from powder fuels and liquid fuel is ejected through a fuel ejection means; primary air is ejected through primary air-ejecting means arranged on outer and inner sides of the fuel ejection means, to form outer and inner primary air-ejection straight streams between which the fuel ejection stream is interposed, and to burn the fuel ejection stream. When a powder fuel is used, optionally, a liquid fuel is further ejected and mixed with the above-mentioned primary air streams, and the liquid and powder fuels are burnt together.
    Type: Application
    Filed: February 9, 2001
    Publication date: October 25, 2001
    Inventors: Katsuji Mukai, Yoshihiko Sumitani, Toshiyuki Ishinohachi
  • Publication number: 20010025591
    Abstract: A system for combusting difficult to combust fluid such as waste fluid wherein fuel and gaseous oxidant combust in a hot combustion gas chamber to form a hot combustion gas mixture which is accelerated to a high speed and at a steady, i.e. non-pulsing, flow is then used to atomize and then combust the fluid.
    Type: Application
    Filed: February 26, 2001
    Publication date: October 4, 2001
    Inventors: Lawrence E. Bool, John Erling Anderson, Glenn William Arnold, Christopher Brian Leger
  • Patent number: 6269755
    Abstract: Various burner configurations for combustion of a particulate fuel such as sawdust, and many types of varying moisture content biomass fuels such as poultry litter. The burners exhibit a high turndown ratio. the burners include a housing defining an upright combustion chamber lined with refractory material and generally circular cross section, a main combustion region within an upper extent the combustion chamber, an initial combustion zone at a lower end of the combustion chamber of reduced-size cross-section compared to the combustion chamber and a transition region increasing in cross-section from the initial combustion zone to the main combustion region. A principal fuel (e.g., sawdust) is supplied with combustion air to the initial combustion region, and an auxiliary ignition fuel supplies heat to the initial combustion region for igniting the principal fuel.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: August 7, 2001
    Assignee: Independent Stave Company, Inc.
    Inventors: John J. Boswell, Dale R. Eichmeyer
  • Patent number: 6260492
    Abstract: A method of combustion in a pressurized, fluidized bed and in the freeboard thereof. The combustion method is further characterized by the recirculation of solid sulfur absorbing materials. A gas channel, designed so as to prevent fluidizing gas from entering the channel from below, is provided such that it opens to the freeboard and to a separating member which separates particulate matter from the combustion gasses.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: July 17, 2001
    Assignee: ABB Carbon AB
    Inventors: Christopher Adams, Jim Anderson, Mats Andersson, Roine Brännström, John Weatherby
  • Patent number: 6244200
    Abstract: A method and apparatus for low-NOx combustion of a pulverized solid fuel in which combustion products from a partial oxidation combustor are mixed with a pulverized solid fuel, thereby preheating the pulverized solid fuel and resulting in devolatilization of at least a portion of the pulverized solid fuel. The preheated pulverized solid fuel and the devolatilization products are then burned in a burner firing directly into a combustion chamber.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: June 12, 2001
    Assignee: Institute of Gas Technology
    Inventors: Iosif K. Rabovitser, Richard Knight, Mark J. Khinkis, Hamid A. Abbasi, Stan Wohadlo
  • Patent number: 6237510
    Abstract: A combustion burner includes a mixture nozzle (2) defining a mixture fluid passage through which a mixture fluid (1) containing pulverized coal and conveyor gas flows toward a furnace, secondary and tertiary air passages surrounding the mixture nozzle (2), through which secondary air (6) and tertiary air (9) for combustion purposes flow, respectively; and air injection nozzles (24) provided in the vicinity of an outer periphery of a distal end of the mixture nozzle (2). The air (21) is injected from the air injection nozzles (24) toward the axis of the mixture nozzle, so that the high-temperature gas in the vicinity of the outer periphery of the distal end of the mixture nozzle (2) is drawn into the mixture fluid (1) in the vicinity of the outer periphery of this distal end.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: May 29, 2001
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Toshikazu Tsumura, Kenji Kiyama, Tadashi Jimbo, Shigeki Morita, Koji Kuramashi, Kunio Okiura, Shinichiro Nomura, Miki Mori, Noriyuki Ohyatsu, Noboru Takarayama, Toshihiko Mine, Hironobu Kobayashi, Hirofumi Okazaki
  • Patent number: 6230635
    Abstract: A fuel selected from powder fuels and liquid fuel is ejected through a fuel ejection pipe having an annular ejection opening; primary air is ejected through primary air-ejecting openings arranged on outer and inner sides of the fuel ejection, to form outer and inner primary air-ejection straight streams between which the fuel ejection stream is interposed, and to burn the fuel ejection stream. When a powder fuel is used, optionally, a liquid fuel is further ejected and mixed with the above-mentioned primary air streams, and the liquid and powder fuels are burnt together.
    Type: Grant
    Filed: August 21, 1998
    Date of Patent: May 15, 2001
    Assignee: Sumitomo Osaka Cement Co. Ltd.
    Inventors: Katsuji Mukai, Yoshihiko Sumitani, Toshiyuki Ishinohachi
  • Patent number: 6216613
    Abstract: A process for solid fossil fuel oxidation that utilizes a refractory that defines a reactor core and a combustor chamber in serial communication. The reactor core is heated by burning an air fuel mixture external to the reactor core. A non-oxidizing gas/coal mixture is introduced into the reactor core where heat energy is transferred to the non-oxidizing gas/coal mixture so that the specific heat of the mixture is substantially raised. The non-oxidizing gas/coal mixture is discharged from the reactor core into the combustor chamber at which point an oxidizing medium such as air is introduced in order to instantly oxidize the heated non-oxidizing gas/coal mixture. The non-oxidizing gas may be a flammable gas, such as methane.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: April 17, 2001
    Assignee: Theoretical Thermionics, Inc.
    Inventor: Paul Wachendorfer
  • Patent number: 6196142
    Abstract: A method and apparatus for introducing solid, liquid or gaseous fuel into a burning zone of a rotary kiln for manufacturing cement clinker. Fuel is conducted through a duct or ducts and primary air is conducted through at least two annular ducts arranged substantially concentrically with, and around, the fuel duct(s), the portion of air in one of the air ducts flowing substantially axially, whereas the portion of air in the second of the air ducts comprises air which has a rotary component about the center axis of the burner, and wherein the amount of primary air in the two portions is independently controlled, such that the two portions of primary air are mixed at a lower velocity in a collecting duct into a single primary mixed airstream having a desired axial/rotary flow characteristic, and wherein this airstream is subsequently accelerated up to a desired, higher discharge velocity.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: March 6, 2001
    Assignee: F. L. Smidth & Co., A/S
    Inventor: Ib Ohlsen
  • Patent number: 6152051
    Abstract: A combustion burner includes a mixture nozzle, a gas supply nozzle, and a flow guide. The mixture nozzle extends toward an interior of a furnace, and defines a mixture passage through which a mixture containing powdered solid fuel and gas for transferring the solid fuel flows. A distal end portion of the mixture nozzle is flared so that a flow passage area of the mixture passage increases progressively in a direction of flow of the mixture. The gas supply nozzle radially surrounds the mixture nozzle to define between the gas supply nozzle and the mixture nozzle a gas passage through which a combustion oxygen-containing gas flows toward the furnace. The flow guide is provided within the mixture nozzle at a position upstream of the flared portion of the mixture nozzle with respect to a flow of the mixture so as to make the mixture flow straight along an inner peripheral surface of the flared portion of the mixture nozzle.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: November 28, 2000
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Kenji Kiyama, Toshikazu Tsumura, Tadashi Jimbo, Koji Kuramashi, Shigeki Morita, Miki Mori